Income and Mining Taxes - Income and Mining Tax (Expense) Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Examination [Line Items]
Current Other Tax Expense (Benefit)	$ 0	$ 33	$ (3)
Deferred Other Tax Expense (Benefit)	0	0	0
Income tax (expense) benefit	(34,958)	(37,045)	11,129
United States
Income Tax Examination [Line Items]
Current federal tax expense (benefit)	(25)	(226)	334
Deferred federal income tax expense (benefit)	651	49	(236)
United States — State mining taxes
Income Tax Examination [Line Items]
Current federal tax expense (benefit)	5,691	8,384	4,001
Deferred federal income tax expense (benefit)	(1,037)	354	(251)
United States — Foreign withholding tax
Income Tax Examination [Line Items]
Current federal tax expense (benefit)	862	800	1,598
Canada
Income Tax Examination [Line Items]
Current foreign tax expense (benefit)	0	(232)	(119)
Deferred foreign income tax expense (benefit)	(1,224)	0	(32,084)
Mexico
Income Tax Examination [Line Items]
Current foreign tax expense (benefit)	31,175	36,066	19,619
Deferred foreign income tax expense (benefit)	$ (1,135)	$ (8,117)	$ (3,994)